You can check out a live demo of
the hyphenation patterns in your browser that makes use
of the Hyphenation.js package. You can resize your browser window
to see the hyphenations change, or click the icon at the top right
to turn hyphenation off completely.
You can find the same document typeset using LaTex
here, and a screenshot in
LibreOffice
here.

The patterns are derived automatically from a database
of hyphenated words which should allow easy integration
into other typesetting systems (as long as they are
Free Software).

You can also read a
short article I've written that treats the development of these hyphenation
patterns for Irish, and discusses the development of
computing resources for minority languages more generally.

Download

The file gahyph.tex (for use with (La)TeX and GNU troff)
can be downloaded from CTAN, or the latest version is always available from our
github repository.

The patterns can be used with OpenOffice.org by installing
this extension.

The file hyph_ga_IE.zip (for use with Scribus, or with
LibreOffice/OpenOffice.org if you'd rather not install the above extensions) can be
downloaded from an OpenOffice.org mirror or from
our github repository.

The file ga.xml for Apache FOP or Folio can also be downloaded
from github.

The patterns are integrated directly into the
Hyphenator.js source code,
which comes with good documentation.

See the Usage page for instructions on how
to install and use the patterns with LaTeX.

Contributing

I know of no explicit standards for hyphenation of Irish.
Instead I relied upon:

a small initial database of hyphenated words
from actual printed material,

hyphenations inserted automatically according to
certain morphological rules, and

statistical methods to bootstrap to a larger database.

Occasionally I had to resort to my own (poor) judgement.
Therefore the resulting rules are far from perfect and
likely reflect my
idiosyncratic preference for etymological/morphological
hyphenation over phonological. Please see the
Details page for more
information on what I did and for some concrete examples.

If you'd like to help improve future releases, the easiest way
is to use the patterns to typeset your own documents and
report any problems you encounter.
Alternatively, you can look for errors among the
Top 1000
most frequent words in Irish, hyphenated according to the
current pattern set.